Submerged arc furnace is also called electric arc furnace or resistance furnace. It is mainly used for reducing smelting ore, carbonaceous reducing agent, solvent and other raw materials. It mainly produces ferrosilicon, ferromanganese, ferrochromium, ferrotungsten, silicon manganese alloy and other ferroalloys. It is an important industrial raw material in metallurgical industry and chemical raw materials such as calcium carbide.